Shuttle bobbin



Patented Aug. 28, 1923.

'j intatti WILLIAM R. BERRYMAN, 0F BROOKLYN, NEW YORK.

SHUTTLE BOBBIN.

Application filed November 11, 1921. Serial No. 514,430.

T 0 all whom t may concern.'

Be it known that I, VILLLAM R. Braniv` MAN, a citizen-of the United States of America., residing `at Brooklyn, county of Kings, and State of New York, have invented new and useful Improvements in Shuttle Bobbins, of which the following is a specifica tion. This invention relates to the bobbins employed in the shuttles oflsewing machines and the like. It is contemplated that it will be chiefly useful in connection with such applications, but is not limited thereto,

It is quite usual in placing the thread upon the shuttle bobbin of an' ordinary sew ing machine to rotate the bobbin by suitable apparatus* and so wind the thread thereon.'A

It isdesirable that this rewinding shall be avoided and that the'spool of thread or twine be insertedr in the shuttle as it comes from the `manufacturer without rewinding.

It is the main object of the. invention, therefore, to provide a bobbin of which a cylindrical portion maybe supplied to the manufacturer and on which the thread or twine may be wound by him, which bobbin shall .also comprise parts which may be a'dded to t-he spool jas it comes from the manufacturer to form the :complete bobbin adapted for insertion in the shuttle.

The spool employed by the thread and twine manufacturers is usually a hollow pasteboard cylinder upon which the thread is wound an accordingly I`7 prefer to make the hollow cylindrical or spool'portion of the improved bobbin ofsuch material. Such substances are, however, not suitable to form bearing surfacesas required on a. bobbin `in a shuttle; and it isf therefore a'further object of the invention to so construct the bobin, utilizing the manufacturers spool, that a more durable and accurate bearing surfaceof the bobbin is provided than would be providedby the said spool.

Other and ancillary objects of the inven tion will appear hereinafter.

In the accompanying drawings which illustrate the inventionl: v

Fig. l is aside elevation of a wound bobbin embodying the invention;

and-partly broken away, of a shuttle having the improved bobbin mounted therein;

Fig. 3 is a perspective view of an end head for the bobbin; and

Fig. 2 is a side elevation, partly in section Fig. 4 is a. perspective View of the s ool of the bobbin. p

Referring to the drawings,. the bobbin therein shown comprises a hollow cylindrical spool portion 1, preferably of' pasteboard, upon which the thread or twine 2 is wound in any of the wel'l known ways of winding thread upon a spool. The shuttle 8 may be of any well known or suitable construction having a bobbin recess 4 into which projects a shaft or spindle 5 whereon the bobbin is rotatably mounted.

The spool as it leaves the hands of the manufacturer comprises t-he cylindrical portion 1 with the thread or twine 2 wound thereon. The metal journal members 6 and 7 are then applied thereto when the bobbin may be inserted in theshuttle, the shaft 5 entering within the spool portion l and the journal members as shown in Fig. 2 when the shuttle with the bobbin can be inserted in the sewing machine, the bobbin rotating upon the shaft 5 in the usual way.l Each of the journal members comprises a side por tion 8 from which extends a projection 9 adapted to tit rather tightly within the end of the tube portion l, while the hole l() extend? ing entirely through the head is of adiameter such 'as to give a running it about the shaft 5. Each journal member is a single integral piece so that there is no danger of the side falling off as where the side and projection are separate pieces. f'

To prepare the spool as it; comes from the manufacturer to be entered within the shuttle, the journal members 6 and 7 are put in place at either end by-telescoping the pro jections 9 within'the ends of the s ool portion l. The bobbin is then placedp in position within the shuttle by entering the shaft through the journal members and spool portion.

It will be seen by reference particularly to Fig. 2 that the spool portion l which is usually of material such that it has not suitable wear resistinff' properties or is adapted to accurately hold the bobbin in position, does not come in contact with the shaft 5, but the bearing surface for the bobbin is provided by the journal members which are formed of harder and greater wear resisting material which can be ,fitted with sufficient accuracy to the shaft upon which the bobbin turns and will not deteriorate with undue rapidity in use. The material of the journal Leeeai A die, said bobbin comprising a hollow paper cylinder upon which the thread is Wound and journal members telescoping Within the ends of said cylinder, separable therefronri and provided with axial openings for the reception of the shaft, said shaft extending within said cylinder' and openings, said journal members being formed with thread retaining ianges.

ln testimony whereof l have signed this specification this 10th day of November,

VLLAM R. BERRYMAN. 

